A cobpobation of penn



June 18, 1929. K v F. B. REED 1,718,004

GRINDING OR MIXING MILL Filed March 17, 1928 2 Sheets-Sheet 1 avwwwoz F/m/v/r 5. x7550 3391;; Qua/1404 0 I WITNESS June 18, 1929. F. B. REED 1.718.004

GRINDING OR MIXING MILL Filed March 17, 1928 2 Sheets-Sheet 2 7 5 f V I 4 WWWW/Ml \\\& F 4 5 Z i INVENTOR Ffifl/V/f 5. Eff 0 )JRN ES Patented June 18, 1929.

1 UNITED STATES PATENT OFFICE.

FRANK B. REED, OF CLEARFIELD, PENNSYLVANIA, ASSIGNOR TO CLEARFIELD MA- CHINE COMPANY, OF CLEARFIELD, PENNSYLVANIA, A CORPORATION OF PENN- SYLVANIA.

Application filed March 17, 1928.

This invention relates more especially to that type of grinding or mixing mills in which muller rolls operate in and, in some instances, are rotated by running contact with the material containing pans.

The primary object of my invention is to provide an improved construction and arrangement of parts in a machine of this char actor for the purpose of increasing the efied tiveness of the machine in operation.

One of the objects of my invention is to provide an improved construction wherein those parts which are peculiarly subjectto wear and tear may be readily repaired or replaced.

Another object of this invention is to provide an improved construction and arrangement of the parts whereby the pan-scraping and pan-emptying disks in a machine of this character may be cooperatively controlled to better advantage.

Another object of this invention is to provide an improved construction for grinding or mixing pans whereby their rims may be readily removed and replaced and an improved formation of said rims with respect to the size sha )e and location of the em )tier and scraper disks employed therewith.

Another object of invention is to provide elliptier and scraper disks of improved form and construction whereby said disks are bet ter adapted to cooperate with the muller rolls and whereby the proper size and conformation of said disks with respect to the rim of the pa u, may be maintained while at the same time prolonging the life of the disks themselves.

Other and further objects of my invention will appear in the specification in connection with the accompanying drawings which show a preferred embodiment of the invention.

In the drawings Figure 1 is a top plan view of those portions of a mixing or grinding mill to which my invention more immediately relates.

Figure 2 is an enlarged vertical section corresponding to the line 2-2, of Figure 1, parts being broken away and parts shown in elevation.

Figure 3 an enlarged detail section corresponding to the line 3-3, of Figure 1, parts being shown in elevation.

Figure 4 is an enlarged vertical section cor- Serial No. 262,358.

Grinding 790m.

According to the embodiment of my invention shown on the drawings, the rotary pan of the grinding or mixing mill includes a table or support 1 provided around its outer pcriphery with an annular recess 2. Seated in the annular recess 2, is a rim-supporting ring or plate 3 provided with an upwardly-presented flange 4. Concentrically arranged with respect to the table or support 1 is a center plate or disk 5, the outer peripheral edge thereof being flush with the cylindrical wall of annular recess 2, the inner peripheral edge of the rim-supporting plate 3 being arranged in abutment with the outer edge of center plate 5 and cylindrical shoulder formed in table 1 by the recess Q. Mounted upon the rim-supporting plate 3 is a removable rim 6, said rim being provided with a base portion 7 seated upon the plate or ring 3 and having its outer periphery in abutment with the upwardly-presented flange 1. Said base portion 7 of the demountable rim 6 is provided with an undercut inner periphery 7 interposed between the outer periphery of center plate 5 and the inner periphery of the base portion 7 of rim 6, a false ring or annular plate 8, which is adapted to interlock with the base portion 7 of rim 6 by means of an o'utwardly-bevcled lower corner 8 which tits in and under the inner periphery 7 of said base portion 7. By means of this construction, it becomes possible to secure the false ring plate 8 in place without the use of bolts and henceavoids the common. practice of forming holes in said plates and thus weakening them.

Muller roZZs.

The muller rolls 9, 9, are represented diagrammatically in Figurel, said rolls, according to the present embodiment of my invention, being adapted to be driven by means of their running engagement with the grinding or mixing pan.

Combined scraper and emptier disk.

According to the preferred embodiinent of my invention, this device is constructed as follows. Arranged parallel to the common 1'0- tary axis of rolls .9, 9, and on opposite sides of said rotary axis, are fixed supports or. bars 10, 10, wh1ch may be made with rectangular cross-sections as shown in Figures 2 and 4-. Slidably adjustable along one of said bars, is a block 11 provided with a V-shaped notch adapting it to slidably engage one corner of the bar 10. Extending around the bar 10 and through suitable holes in'the block 11, are spaced yoke bolts 12, 12, the outer ends'of said yoke bolts being secured by nuts1-3, 13, on the outer face of a second block 141-. Said blocks Hand 14: together form a clamp which grips one branch 15* of an inverted U-shaped connection 15, the other branch 15" thereof carrying a collar 16 which is secured thereto by meansof'a setscrew'17. Acylindrical block 18 which is supported by the collar 16 is escillatably connected'to the said branch-15 of the U-shaped connection 15, Rigidly mounted at one end in the cylindrical block 18, is'a 'lever arm 19 which is provided at its outer end with a'hand-grip 21 by means of which said lever arm may be oscillated in a horizontal plane. J o'ur'naled upon the inner end of said lever arm an'dthus upon a horizontally movable axis, is the hub portion 20 of a coi'n'bined scraper and emptier disk 22, said disk being axially continedbetween the hub portions 23, 3, of two knife-supporting bracket arms 24, 24-, which are provided with bearing lugs 25, 25, for receiving the shanks 26, 26, of kn iv'es 27, 27, which extend radially along oppos te faces of disk 22. Suitable means for limiting the angular throw of lever arm 19 in'either direction, may be provided by means of stop-lugs 28, 28, which depend Scraper dis/o. Y

Asshown in Figure 4, the scraper disk mount provides a combined angular and straightline adj ustmentof the scraper'diskin a manner substantially similar to that described above for the combined scraper and emptier disk. Thus the rectangulaifguide bar 10 carries a slide block 11 whichis re- In each of said tained in position by yoke-bolts 12, 12, said bolts passing through holes in block 11 and a keeper block 1 1'and'having'nuts 13, 13, threaded tothe outer endsthereof. This adjustable clamp is adapted to receivethe downward]y-presentedend of abentbrackeh fore it passes under the muller roll. In this Wayabetter mixture of the mass is secured.

In order to more effectively maintain a close-fitting contactbetween the peripheries of disks'22 and 33 and the inner wall of rim 6, said disks are provided with re iila'ceable peripheral bands 22" and 33 respectively whereby stantially constantin diameter and their usefulness thus prolonged. As shown in Figure 1:, the scraper disk 33 mayhave its outer peripheral corner rounded to insure smoother running contact between it and the inner wall of the grinding pan. By means of this construction, the wear a'nd't'earon the inner surface of rim 6 is more uniformly distributed. It will'be understoodfromfthis description that as soonas either of said disks begins to show an undesirable amount of wear, the re place'able peripheral band 22 or 33 may be replacedby' a newband which again restores the disk to full size.

By an inspection of Figure 2, it will be seen that-the demountable rim 6' rests upon the outside false ring-'3 and overlaps the outer periphery of the false ring plate 8. The

flared curved form of this demountable riln 6 is designed with reference to the size, shape and location of the emptier and scraper disks said dis is may be maintained sub iii 22 and 33. Thus, the rim 6 is so shaped that h the scraper andempti er disk 22 when swung to and-fro in a horizontal plane, will make a proper contact with said rim in both of its extreme positions. At the same time, the scraper disk 33 of smaller size is arranged at a different angle and. thus provided with proper contact with rim 6. The diameter of the combined scraper and emptier disk 22 is made considerably more than twice the height of the rim 6 above the top surface ofthe false ring plate 8 while the diameter of scraper disk 33 is made only slightly larger than double the height of rim 6. As the pan rotates'in the direction-indicated by an arrow in Figure 1, the disk 22 is retainedin itsextreme counter-cl0ckwise position and operates as a scraper for directing the material to r0119 This position corresponds to the arranged to deflect the'material to the outer edge of the other roll 9 which impels said materm] in a continuous stream which may be emptied from the pan at times when the empticr disk 22 is forcibly moved to its eX- treme clockwise position by means of the handle or stud 19 which is provided for this purpose. If and when desired, the scra icr disk 33, operating always in the position shown in Figure 1, may be replaced by a combined scraper and emptier disk 22 and adapted to operate alternately as a scraper and cmptier disk in the manner described in connection with emptier disk 22. The preferred form of scraper disk 33 is shown best in Figure 4, described above and when desired, the scraper and emptier disk 22 may be similarly formed.

I claim 1. The combination with a rotary pan having an upwardly flared rim provided with an inner wall forming a surface o'lrevolution around the rotary axis of said pan, of a scraper disk rotatable on a horizontal axis in said pan and having its peripheral edge contacting with the inner wall of said pan along a circular are lying within said surface at revolution.

2. The combination with a rotary pan provided with an upwardly-flaredrim and mullcr rolls operating therein, of a combined scraper and emptier disk operating in said rotary Jan, and a journalling support for said com ined scraper and emptier disk, said journalling support being movable in a horizontal plane to adapt said COllllJlIltKIl scraper and emptier disk to assume ditl'erent angular positions with respect to the inner surface of said rotary grinding pan for operating alternatively as a scraper or emptier disk.

3. A rotary pan provided with an upwardly flared rim of curved cross-section, a muller roll operating in a vertical plane parallel to the axis of said rotary pan, a scraper disk operating in a plane intersecting the first-mentioned plane and having a pcripheral edge corresponding to the intersection of the second-ment-ioned plane with the inner surface of said rim, and an empticr disk normally operating in a plane intersecting the inner wall of said rim in a curve con- :l'orming to the outer periphery of said emptier disk and movable into a second plane o't operation which intersects the inner wall of said rim in a curve coutori'ning to the pew riphery of said emptier disk, said operating planes of the emptier disk being divergent from the inner wall of said rim in directions respectively presented away from and towards said muller roll.

-l-. The combination with a mixing and grinding pan rotatable on a vertical axis, of mnller rolls running therein, a fixed support extending across and above the upper edge of said grinding pan, an inverted U- shaped connection, one branch of said U shaped connection being adjustably secured to said fixed support, a sleeve support adjustably seemed to the other branch of said U-shap'ed connection, a disk-supporting arm presented radially from said sleeve support, adisk journalled on said disk-stIpporting arm, and axially-spaced collars secured to said disk-supporting arm on opposite sides of said disk. t

A rotary pan for n'iixing and grinding mills, eonuirising a rotary table or support, an annular rim-supporting plate mounted upon and. concentrially arranged with respect to said lffil ttl'fflllllilltl or support, a de mount-able riu'i concentrically arranged with respect to said rotary table or support and mounted thereon by means of said rim-supporting plate, and a re ilacea-ble false ring mounted on said rim-supporting plate 'n'ithin said rim, said rim andtalse ring having in terlocking portions for holdingtho latter against lateral or upward displacen'ient.

A rotary pan for mixing and grinding mills, said rotary pan comprising a rotary table or support, an annular rim-supporting plate carried by said rotary table or support, a rim provided with a base portion seated upon said annular rim-supporting plate, said base-portion of the rim being provided with an undercut inner periphery, an annular plate or false ring having its outer periphery interlocking with the undercut inner periphery of said base-portion of the rim and a center plate mounted within said annular plate or false ring.

7. A rotary pan for mixingand grinding mills comprising a rotary table or support, an annular rim-supporting plate seated thereon, said rim-stupporting plate being provided with an upwardly-presented flange eX- tending around the outer periphery thereof, a rim provided with a base portion seated upon said annular rimsupporting plate and having its outer periphery in abutment with said upvmrdly- 'iresented flange, an annular plate or false ring having its outer periphery in interlocking engagement with the inner ')eriphery of said base-portion ol the rim, and a center grinding disk mounted on said rotary table or support and having an outer periphery in abutment with the inner periphery of said false ringl -8. A rotary pan for mixing and grinding mills, said rotary pan coujiprisingzj a rotary table or support provided with a peripheral recess, an annular rim-supporting plate seated within said peripheral recess, said rim-suppin'ting plate being provided with an upwardly-presented flange extending around the outer periphery thereof, a do mountable rim provided with a base portion siated upon said annular rint-supporting plate and havingits outer periphery in abutment with said upwardly-presented flange, said basesportion of the rim being provided with an undercut inner periphery forming an angular recess with the upper surface of said rim-supporting plate, an annular plate having its outer periphery beveled and interlocking with the undercut inner periphery of said base-portion of the rim, the inner periphery of said annular plate being in register with the inner periphery of said annular rim-supporting plate, and a center grinding disk mounted on said rotary table or support and having an outer periphery in abut-- ment with the inner peripheries of said rimsupporting plate and false ring.

9. The combination with a mixing and grinding pan rotatable on a vertical axis, of

. muller rolls running therein, a fixed support extending across and above the upper edge of said grinding pan, an inverted U-shaped connection carried by said fixed support, one branch of said U-shaped' connection being connected to said horizontal support, a sleeve mounted on the other branch of said U shaped connection, a disk-supportingarm present-ed radially from said sleeve, and a disk journalled on said disk-supporting arm.

10. In a mixing and grinding pan, the combination with a rotary mixing and grinding pan, provided with an upwardly-flared rim and a muller roll operating in said mixing and grinding pan, a bar support extending across and above the upper edge of said upwardly-flared rim, a clamp-support adjustable along said bar-support, a disk-supporting arm pivotally mounted in said clampsupport, and a disk journalled in said disksupporting arm and adapted by its pivotal mount in the former to be moved alternately into positions to operate as scraper disk and pan-emptying 'disk respectively in connection with the inner wall of said upwardlyflared rim.

11. The combination with a rotary pan having an upwardly-flared rim and a roll operating in said rotary pan, of a rotary disk operating in one angular relation to said rim as a scraper disk for directing material into the path of said roll and in another angular relation thereto for operating as an emptier disk, and means for adjusting said rotary disk from one to the other of said angular relations. I

12. The combination with a rotary pan having an upwardly-flared rim provided with an inner wall forming a surface of revolution around the rotary, axis of said pan and a muller roll operating in said rotary pan, of a rotary disk operatable in said pan inv two different positions and having its peripheral edgein each of said positions contacting with the inner wall of said'pan along a circular are lying within said surface of revolution, said rotary disk being thereby adapted to operate as a scraper disk and as an emptier disk in said positions respectively.

13. The combination with a rotary mixing and grinding pan provided with an upwardly-fiared rim and with muller rolls operating therein, of a rotary disk journalled upon a horizontal axis and operating in said mixing and grinding pan, the rotary axis of said disk being movable to and fro in a horizontal plane between positions in which said rotary disk is presented in successive positions with respect to said upwardly-flared rim to operate as a scraper and emptier disk respectively. v

14. The combination with a rotary pan provided with an upwardly-flared rim and with muller rolls operating therein, of a rotary disk rotatable in a horizontal axis.

within said rotary pan, and a journalling support for said rotary disk movable in a horizontal plane between positions in which said rotary disk is adapted to have running contact with said upwardly-flared rim as a scraper and emptier disk respectively.

15. The combination with a rotary pan provided with an upwardly flared curved rim, of a mullerroll operating therein, a scraper disk rotating on a horizontal axis and adjustable in a horizontal plane within said rotary pan, said scraper disk having an outer periphery conforming to the rim of said grindlng pan.

16. The combination with a mixing and grinding pan provided with an upwardlyflared rim and having muller rolls running therein, of a rigid support arranged above and extending across the upper edge of said grinding pan, a lever arm presented away from said'rigid support, a disk journalled on said lever arm, and means adjustable along said rigid support for pivotally mount ing said lever arm and for adjustingthe position of said disk with respect to the inner wall of said upwardly-flared rim.

17. In a rotary mill of the character described, the combination of a rotary pan having a replaceable rim provided with an inner wall conforming to a surface of revolution concentric with the rotary axis of said pan, of a rotary disk operating in said rotary pan and having a peripheral edge contacting with and conforming to said surface of revolution.

18. In a rotary mill of the character described, the combination of a rotary pan having a replaceable rim provided with an inner wall conforming to a surface of revolution concentric with the rotary axis of said pan, of a rotary disk operating in said rotary pan and having a peripheral edge contacting with and conforming to said surface of revprovided with a replaceable rim, said rotary disk being arranged to operate in said pan With the replaceable rim of said disk in sliding engagement with said surface of revolution from top to bottom of said rim.

20. In a rotary mill of the character described, the combination of a rotary pan having a replaceable rim provided with an inner Wall conforming to a surface of revolution, of a rotary disk operating in said rotary pan, said rotary disk being provided with a replaceable rim contacting with the inner Wall of said rim in a line lying entirely Within the surface of revolution of said inner Wall of the replaceable rim.

21. In a rotary mill of the character de scribed, the eombii'iation with a rotary pan comprising a center plate, a r -3])laeeable rim provided with a base-portion spaced out- Wardly from the outer edge of said center plate, and a false ring plate interposed between said center plate and the base portion of said replaceable rim.

FRANK B. REED. 

